NV_PAUSEFRAME_TX_CAPABLE
if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) {
if (pause->tx_pause && !(np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)) {
if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)
np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE | NV_PAUSEFRAME_TX_REQ;